mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-12-23 10:05:46 -05:00
135 lines
3.5 KiB
C++
135 lines
3.5 KiB
C++
/* fmsq.h
|
|
|
|
This file is part of a program that implements a Software-Defined Radio.
|
|
|
|
Copyright (C) 2013, 2016 Warren Pratt, NR0V
|
|
Copyright (C) 2024 Edouard Griffiths, F4EXB Adapted to SDRangel
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
|
|
The author can be reached by email at
|
|
|
|
warren@wpratt.com
|
|
|
|
*/
|
|
|
|
#ifndef wdsp_fmsq_h
|
|
#define wdsp_fmsq_h
|
|
|
|
#include <array>
|
|
#include <vector>
|
|
|
|
#include "export.h"
|
|
|
|
namespace WDSP {
|
|
|
|
class FIRCORE;
|
|
|
|
class WDSP_API FMSQ
|
|
{
|
|
public:
|
|
enum class FMSQState
|
|
{
|
|
MUTED,
|
|
INCREASE,
|
|
UNMUTED,
|
|
TAIL,
|
|
DECREASE
|
|
};
|
|
|
|
int run; // 0 if squelch system is OFF; 1 if it's ON
|
|
int size; // size of input/output buffers
|
|
float* insig; // squelch input signal buffer
|
|
float* outsig; // squelch output signal buffer
|
|
float* trigger; // buffer used to trigger mute/unmute (may be same as input; matches timing of input buffer)
|
|
double rate; // sample rate
|
|
std::vector<float> noise;
|
|
double fc; // corner frequency for sig / noise detection
|
|
double* pllpole; // pointer to pole frequency of the fm demodulator pll
|
|
std::array<float, 4> F;
|
|
std::array<float, 4> G;
|
|
double avtau; // time constant for averaging noise
|
|
double avm;
|
|
double onem_avm;
|
|
double avnoise;
|
|
double longtau; // time constant for long averaging
|
|
double longavm;
|
|
double onem_longavm;
|
|
double longnoise;
|
|
FMSQState state; // state machine control
|
|
int count;
|
|
double tup;
|
|
double tdown;
|
|
int ntup;
|
|
int ntdown;
|
|
std::vector<double> cup;
|
|
std::vector<double> cdown;
|
|
double tail_thresh;
|
|
double unmute_thresh;
|
|
double min_tail;
|
|
double max_tail;
|
|
int ready;
|
|
double ramp;
|
|
double rstep;
|
|
double tdelay;
|
|
int nc;
|
|
int mp;
|
|
FIRCORE *p;
|
|
|
|
FMSQ(
|
|
int _run,
|
|
int _size,
|
|
float* _insig,
|
|
float* _outsig,
|
|
float* _trigger,
|
|
int _rate,
|
|
double _fc,
|
|
double* _pllpole,
|
|
double _tdelay,
|
|
double _avtau,
|
|
double _longtau,
|
|
double _tup,
|
|
double _tdown,
|
|
double _tail_thresh,
|
|
double _unmute_thresh,
|
|
double _min_tail,
|
|
double _max_tail,
|
|
int _nc,
|
|
int _mp
|
|
);
|
|
FMSQ(const FMSQ&) = delete;
|
|
FMSQ& operator=(const FMSQ& other) = delete;
|
|
~FMSQ();
|
|
|
|
void flush();
|
|
void execute();
|
|
void setBuffers(float* in, float* out, float* trig);
|
|
void setSamplerate(int rate);
|
|
void setSize(int size);
|
|
// Public Properties
|
|
void setRun(int run);
|
|
void setThreshold(double threshold);
|
|
void setNC(int nc);
|
|
void setMP(int mp);
|
|
|
|
private:
|
|
void calc();
|
|
void decalc();
|
|
};
|
|
|
|
} // namespace WDSP
|
|
|
|
#endif
|